55757442 has 16 divisors (see below), whose sum is σ = 120093120. Its totient is φ = 17156112.

The previous prime is 55757441. The next prime is 55757453. The reversal of 55757442 is 24475755.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 55757442.

It is not an unprimeable number, because it can be changed into a prime (55757441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357342 + ... + 357497.

It is an arithmetic number, because the mean of its divisors is an integer number (7505820).

Almost surely, 2^55757442 is an apocalyptic number.

55757442 is an abundant number, since it is smaller than the sum of its proper divisors (64335678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55757442 is a wasteful number, since it uses less digits than its factorization.

55757442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714857.

The product of its digits is 196000, while the sum is 39.

The square root of 55757442 is about 7467.0905980844. The cubic root of 55757442 is about 382.0330600117.

The spelling of 55757442 in words is "fifty-five million, seven hundred fifty-seven thousand, four hundred forty-two".